Connect my zeb duke wireless bluetooth headphone using terminal in fedora 40

 install bluez-deprecated 

sudo dnf install bluez-deprecated

hcitool scan

should show the bluetooth devices

if not 

bluetoothctl

agent on
scan on # wait for your device's address to show up here
scan off
trust MAC_ADDRESS (in my case 41:42:FF:71:7A:6B)
pair MAC_ADDRRESS(in my case 41:42:FF:71:7A:6B) 

// the above comment will fail  if the device is already paired
connect MAC_ADDRESS (in my case 41:42:FF:71:7A:6B)

there are simpler ways off course

bluetoothctl devices

this will show the device with the mac address

now if the device is not paired 

bluetoothctl pair 41:42:FF:71:7A:6B

if this succeeds then

bluetoothctl connect 41:42:FF:71:7A:6B

to disconnect

bluetoothctl disconnect 41:42:FF:71:7A:6B

 

 to remove the pairing

bluetoothctl remove 41:42:FF:71:7A:6B

Source:https://unix.stackexchange.com/questions/96693/connect-to-a-bluetooth-device-via-terminal

Source:https://unix.stackexchange.com/questions/96693/connect-to-a-bluetooth-device-via-terminal

Source:https://askubuntu.com/questions/758586/how-to-unpair-bluetooth-device-from-the-command-line

Source:https://www.baeldung.com/linux/bluetooth-via-terminal

Enable javafx option in eclipse,javafx is not showing solved

 Open eclipse,create a java project,click help,click install new software

in the label beside work with 

paste

https://download.eclipse.org/efxclipse/updates-released/3.9.0/site/

there might open a box 

you have to type there

e(fx)clipse

 

select every component ,install

 

restart eclicpse

 

Source:https://www.youtube.com/watch?v=s3Gz1ivERzY

Install eclipse on fedora using flatpack

flatpak install org.eclipse.Java

Switch from One Java Version to Another

Switch from One Java Version to Another



If you have multiple Java versions installed on your system, you can list them by using the alternatives command: sudo alternatives --config java

The currently active version is marked with a + sign.

To switch to another version, type the appropriate number and press Enter.

Install java (openjdk and oraclejdk) on fedora 40

search openjdk version

dnf search openjdk

sudo dnf install java-latest-openjdk.x86_64




java -version




showing i installed version 21




now go the oracle jdk download page




https://www.oracle.com/java/technologies/downloads/?er=221886




I downloaded jdk-23_linux-x64_bin.tar.gz




sudo mkdir -p /usr/local/java




cd Downloads



sudo cp -r jdk-23_linux-x64_bin.tar.gz /usr/local/java



sudo tar zxvf jdk-23_linux-x64_bin.tar.gz




sudo nano /etc/profile



add the following lines





JAVA_HOME=/usr/local/java/jdk-23.0.1
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export PATH


save the file and close
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/jdk-23.0.1/bin/java" 1
echo $?
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/jdk-23.0.1/bin/javac" 1
echo $?
sudo update-alternatives --install "/usr/bin/javaws.itweb" "javaws.itweb" "/usr/local/java/jdk-23.0.1/bin/javaws.itweb" 1
echo $?
sudo update-alternatives --set java /usr/local/java/jdk-23.0.1/bin/java
sudo update-alternatives --set javac /usr/local/java/jdk-23.0.1/bin/javac
sudo update-alternatives --set javaws.itweb /usr/local/java/jdk-23.0.1/bin/javaws.itweb
source /etc/profile
reboot

now both java and javac command is working..

 

Source:https://phoenixnap.com/kb/fedora-install-java